Blade-fastening.



State of Wisconsin have or MILW UKEE,

NORMAN C. BASSETIOF MILWAUKEE, WISCONSIN,

BLADE-FASTENING.

Specification of Letters Iatent.

Patented. March 16, 1909.

Application filed m 20, 1908. Serial No. 444,510.

To cllwhom it may concern:

Be it known thatl, 'N BMAN' C, Bnssnrr, residing at of Milwaukee and invented a certain new and useful'lmprovementjin Blade-Fas tenings, of which the tion;

Milwaukee, in the county This invention relates to aimeans of fastening the blades of any fluid propelled 'engine, or the blades of fans or'rotary pumps for propelling a fluid, and has for its object to provide a fastening means capable of being used in any case where it is desired to.

firmly secure to some member a plurality of similarelements.

The term blade as used in these speci-' fications and claims is not limited to any spigial formnor to those of' any special mac e, the form shown being used since it is one instance to which the invention is suitably adapted.

In the accompanying drawings which form a part 10f this specification, like figures which may appear in different views denote the same element.

Figure 1 is a plan view a blade-carrying element of a fragment of or base with the blades, which are shown in section, secured therein. Fig. 2-is an elevation of the device shown in'Fig. 1, the blade-carrying element or base being in section. Fig. 3 is a'plan view of a fragment of a modification of a blade-carrying. elementor base in which the blades are shown in section and secured therein. Fig. 4 is an elevation of the modis fication'shown in Fig. 3 with the blade-carrying element or base shown in section.

The blade-carrying element 1 is provided with a groove or recess 2, the sides of which are tapered so as to make its cross-section of a glove-tail form as shown in Figs. 2 aud t. The blades 3 have. a root or projection 4 at one end, ada ted to fit the groove 2 and havmg an angu ar section as shown in Figs l and 3. When the blades are in place, the angular section has one of'its arms at an angle to the tapered sides of the groove 2, while the other arm is parallel-to these sides and bears upon one of them. The portion of the groove 2 between fthe blades contains the distance pieces 5 which hold the blades distance pieces well as holding themfirmly in place. These distance pieces 5 are of such a shape that they fill the entire cavity in groove 2 between. the blades and are shown of two types in the drawings. Figs. 1 and 2 show 5 composed of separate strips or laminations 6, wh le Figs. 3 and 4 show same 318 a One P1608.

In the construction as shown in Figs. 1 and 2 various materials might be used to make up the distance pieces since easily beswung into position after the blade has been placed. As shown in Figs. 3 and 4,

the distance pieces should be made of a calking material so that they. could be pounded to fill every part of the groove.

As may be seen in igs. 1 and 3, the distance pieces bear on both arms of the angular blade root so that they against one side of the roove of the bladecarrying element as wel as against the distance piece on the opposite side of the blade. This insures a close fitting of the dove-tail shaped root of the blade within the dovetail shaped groove 2 in the base 1.

I Iii-desired,

the blade root 4 may be fdrmed o'that one armof its angle has its lower edge 7- bent inwardly so as to form an angle or it will press this turned over lower edge or book against the bottom of groove 2. This bent position orhook might be extended along the entire lower edge ofthe root of the blade, in which case an additional fastening or holding efiect would be obtained From the foregoing description it will be seen that the invention embodies a very simple andefiicient means of blade fastening. It should be understood that it is not desired to be limited to the exact details of construction shown and described, for obvious modifications will occur to a person skilled in the art. Y

' Itis claimed and desired to secure by Letters Patent:

1. The combination of a grooved base, blades having roots located Within' said groove and extended entirely thereacross, and distance pieces between said blade root's, said roots having aportion oi each located between a distance piece and a wall of said groove and having an opposite portion lying at the'proper distances from each other as against another wall of said groove whereby ASSIGNOR o ALLI s-cnALMEns COMPANY, WISCONSIN, A CORPORATION or NEW JERSEY.

the strips 6 could press the blade said roots are both clamped and locked beeach to-lie in part betweenav distance piere tween said walls. and the-bottom of said groow. 10 2. The-combination of a grooved base, In testimony WllOl'LOi,l allix my signature blades having roots located Within said in the presence of two witnesses. 5 groove, and distance pieces between said NORMAN C. BASSETI.

blade roots, said roots having a portion of Witnesses: each located between a distance piece and a H. C. GASE, wall of said groove, and said roots formed G. F. DE \YEIX. 

